Welcome to walled gardens!
Welcome to walled gardens! Buy a new computer, and then you can pay for software you don't own AND use it! Because you know, these reason you can't just download an old version, or update your OS is to protect the public's experience of the product. Can't have you unable to find support for something a decade old, and it would be terrible if for some reason your version didn't have all of the changes that the new version does. After all, they worked real hard on that and lots of investors clapped.
Really though, there is a reason I don't suggest this combo to my friends and colleagues. Having two ecosystems which both limit versioning in different ways is a fast way to get your workflow nuked. The fact that you lose access to things you've previously been able to have is also a crying shame. I'm still on CS6 because perpetual lisence, and it's running faster and smoother than anything AE 2017+... and I suspect it"'s half because my computer is a 2017, and because adobe software is famous for bloat and poor usage of novel hardware.
Mod note: Branched and moved to the Video Lounge. Title was changed.
